Update renovate config to monitor all the things

Update to latest kubectl images + get renovate to monitor everything.

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Closes https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/issues/148

Closes https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/issues/147

Package MR for https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/issues/152